Shader "Custom/Background"
{
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
        [PerRendererData]_MainTex ("Sprite Texture", 2D) = "white" {}
        _Cutoff("Shadow alpha cutoff", Range(0,1)) = 0.5
    }
    SubShader {
        Tags 
        { 
            "Queue"="Geometry"
            "RenderType"="TransparentCutout"
        }
        LOD 200
        Cull Off

        CGPROGRAM
        #pragma surface surf Lambert addshadow fullforwardshadows
        #pragma target 3.0

        sampler2D _MainTex;
        fixed4 _Color;
        fixed _Cutoff;

        struct Input
        {
            float2 uv_MainTex;
        };

        void surf (Input IN, inout SurfaceOutput o) {
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb;
            o.Alpha = c.a;
            clip(o.Alpha - _Cutoff);
        }
        ENDCG
    }
    FallBack "Diffuse"
}